CN1380428A - Method for extracting vanadium by roasting material containing vanadium and its equipment - Google Patents
Method for extracting vanadium by roasting material containing vanadium and its equipment Download PDFInfo
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Abstract
The present invention relates to a method for extracting vanadium by roosting vanadium-containing material and its equipment for implementing said method. Said method includes the following steps: pulverizing vanadium-containing material, mixing it with additive fuel, alkali metal salt and substance capable of reacting with acid gas to obtain raw material balls, placing the raw material balls into roasting furnace from its upper portion, making the raw material balls move from top to bottom and undergo the processes of drying, preheating in upper portion, coating in middle portion and cooling in lower portion, and discharging from lower portion of roasting furnace so as to implement said invention.
Description
Technical Field
The invention relates to a method for extracting vanadium from a vanadium-containing material.
The invention also relates to a device for carrying out the method.
Background
Vanadium is a rare metal with high melting point, can form compounds with valence states of 2, 3, 4 and 5 and various alloys, and is widely applied to the industries of metallurgy, chemical industry, aerospace, electronics, glass ceramics, machinery, building materials and storage batteries.
Vanadium is an ore body which is basically not formed by independent minerals in the natural world and is associated with iron, lead, copper, molybdenum, uranium, phosphorus and aluminosilicate in the forms of ion alternation and ion adsorptionIn the mineral of (1). At present, most of the vanadium products in the world are comprehensively recovered from vanadium slag of iron ore steelmaking containing vanadium. And China also has more than twenty years of medium and small-scale vanadium extraction production from vanadium-containing stone coal and vanadium-containing clay. The roasting process is the first process for determining the success or failure and scale of the vanadium extraction process, and has the technical and economic indexes, social benefits and environmental protection. The traditional vanadium-containing material roasting vanadium extraction process and additive are different due to different material types, the steel-making vanadium slag system adopts fine powder thereof to add common salt and soda ash with total ore amount of 1/8-1/5 to roast in a nearly horizontal rotary kiln, and the vanadium-containing stone coal and clay system are roasted in an open hearthafter being granulated by adding common salt and mirabilite into coarse powder with the particle size of less than 5mm, but the traditional vanadium-containing material roasting vanadium extraction process and additive have the following defects: (1) chlorine, hydrogen chloride or SO2The problem of environmental pollution caused by gas, particularly the salt dosage of the stone coal clay type vanadium ore accounts for about 1/8-1/4 of the ore amount, and the mirabilite dosage exceeds 1/4-1/2, so that Cl generated in the roasting process reaction2HCl and SO2The pollution to the atmosphere is particularly serious; (2) because of large sodium salt dosage, the raw material containing moisture is crystallized and agglomerated in the drying process in the furnace to form a hard shed shell, so that the roasting is not uniform due to uneven air distribution in the furnace, and the conversion leaching rate of roasting technical indexes is low and is only about 40 percent; in the method, because the horizontal long-groove type open hearth furnace is used for roasting, and hard shed shells are easily formed when the salt material balls are dried, only intermittent operation is available, and continuous mechanization and scale in the roasting process are not easy to realize; (3) the industrial hygiene of the production workshop is extremely poor, and the labor intensity is high. Therefore, the traditional roasting process of the stone coal and clay type vanadium ore can only carry out small-scale intermittent production, and is difficult to form a large industry.
However, the reserves of stone coal and clay vanadium ore in China are quite large, and only the five provinces in the south are V2O5The reserve amount is over hundred million tons, which is far larger than the reserve amount in vanadium-containing iron ore, and the potential economic value is measured in trillion yuan, thus solving the above disadvantages of the prior art and being a technical subject to be solved urgently.
Disclosure of Invention
The invention aims to provide a method for roasting and extracting vanadium from vanadium-containing materials, which can realize continuous mechanical production, meet the requirement of environmental protection, and has the advantages of high vanadium extraction rate, energy conservation and low production cost.
Another object of the invention is to provide an apparatus for carrying out the above method.
The technical scheme of the invention is that ① pelletizing process, namely, crushing vanadium-containing materials into powder, mixing the powder with additives uniformly according to the proportion of 1: 0-30%, 1-25%, 0-10% and (weight percentage, the same below) of vanadium materials, namely, additive A, additive B and additive C, adding water, and pelletizing to prepare a spheroidal raw material with the water content of 8-18%;
② when opening the furnace, fuel is needed to be placed at the bottom of the furnace to help the raw pellets to burn, the raw pellets finish roasting by spontaneous combustion through natural ventilation (after the pellets are burnt, the combustion-supporting fuel is not needed any more)
③ roasting process, wherein the spherical raw material balls enter the furnace from the upper end of the shaft furnace, the raw material balls move from top to bottom in the furnace, the raw material balls are dried and preheated at the upper part of the furnace, the roasted material balls in the middle of the furnace and the cooled at the lower part of the furnace are discharged from the lower end of the shaft furnace by manpower or a discharger, the roasting temperature is 650-950 ℃, the staying time in the furnace is 6-30 hours, the raw material balls self-ignite during the roasting process, after the self-ignition of the raw material balls is finished, the raw material balls are gradually cooled during the movement towards the bottom of the furnace, the raw material balls at the upper part of the furnace are dried and preheated by the ascending hot air flow generated by the combustion of the raw material balls, the raw material balls in the furnace continuously drop freely along with the space vacated by the grate (cooked) material under the action of gravity along with the continuous discharge of the bottom clinker, the continuous mechanical:
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the material ball is processed through the process, the vanadium element contained in the material ball is converted into a vanadium compound which can be dissolved in weak acid, medium and alkaline inorganic solvents, and the vanadium compound is added with a solvent for leaching and purification to prepare V2O5The desired vanadium-containing compoundAnd the conversion leaching rate reaches 60-90%.
Cl generated in the roasting process of the material balls in the middle of the furnace body2HCl and SO2The polluting gases are absorbed by the substances in the upper green pellets which can react with the acid gases, so that the flue gas emission reaches the standard.
The additive A of the invention is fuel: coal and coke with S reaching the standard;
the additive B is additive B1+ additive B2+ additive B3；
Additive B1KCl or NaCl, sylvine (xKCl. yNaCl);
additive B2Is Na2CO3And/or Na2SO4；
Additive B3Is the alkali metal salts of halogen, oxygen, carbon, nitrogen and boron of other elements in the periodic table, which contain oxygen, hydrogen, silicon, OH and crystal water and double salts of alkali metals such as NaHCO3、Na2SO3、Na3PO4、NaH2PO4、Na2B4O710H2O、NaNO3、Na2SiO3、K3CO3、K3SO3Potassium feldspar (K)2O·Al2O3·6SiO2) Albite (Na)2O·Al2O3·6SiO2) Nepheline (Na. K)2O·Al2O3·2SiO2Alum K2SO4·Al2(SO4)3·24H2O。
The additive C is a substance capable of reacting with acid gas, and is weak acid salt, oxide and hydroxide of alkali metal and amphoteric oxide and hydroxide such as Al under high temperature2O3、FeO、Fe2O3Pyrite cinder (mainly FeO. Fe)2O3、FeO、Fe2O3) Siderite (iron carbonate).
The vanadium-containing compound of the inventionThe materials and the additives are as follows: additive A and additive B1Additive B2Additive B3The additive C is mixed evenly according to the weight percentage of 1: 0-18%, 0-8%, 1-8%, 0-8% and 0-8%, and the mixture is added with water and made into a spherical raw material with the water content of 9-17% and the water content of 95% and not more than phi 30mm through a pelletizer.
The vanadium-containing material and the additive are prepared from the following vanadium-containing materials: fuel, NaCl, Na2CO3、Na2SO4The feldspar and the substances capable of reacting with the acid gas are uniformly mixed according to the weight percentage of 1: 0-16%, 1-7%, 1-5%, 0-6%, 0-7% and 0-7%, and water is added to the mixture to prepare a spherical raw material with the water content of 10-16% and the water content of 95% and not more than phi 30mm through a pelletizer.
The vanadium-containing material of the invention is as follows: stone coal type material, clay type material, vanadium-containing waste catalyst material and steelmaking vanadium slag;
when the vanadium-containing material is non-stone coal, the fuel must be added in the ball-making procedure to make the raw material ball containing fuel.
The thickness of the material ball is properly adjusted according to the carbon content of the carbon-containing stone coal vanadium ore material to control the natural air intake and ensure the proper roasting.
The roasting temperature is 650-900 ℃, and the residence time in the furnace is 10-20 hours;
the equipment for implementing the method comprises a crusher, a conveyer, a ball making machine, a roasting furnace, a discharging machine and a leaching device, and is characterized in that: the roaster is a vertical roasting furnace body, the upper end of the furnace is a feed inlet, the lower part of the furnace body is a funnel-shaped structure, the lower end of the funnel-shaped structure is a discharge outlet, and the lower part of the funnel-shaped structure is provided with an adjustable flashboard for adjusting the size of the discharge outlet and an electric vibration unloader or other unloader additionally provided with a grate bar capable of natural ventilation.
The method of the invention canalso be implemented by the equipment in the prior art.
Compared with the prior art, the invention has the following positive effects:
① because of the heterogeneous interaction reaction between the vanadium-containing material and the additive, the pollution of the flue gas and the waste water is greatly reduced on the premise of obtaining the indexes superior to the traditional roasting technology, and the main harmful components in the flue gas reach the requirements of national standard GB 16297-1966 through the detection of environmental protection departments without being treated.
② the sintering temperature is lower than that of the prior art, and the coal can be saved by about 25%.
③ the air is uniformly distributed in the furnace, so the roasting is uniform, the ratio of over-burning and under-burning is reduced, and the conversion leaching rate is 30-70% higher than that of the prior art.
④ the cost of the additive is reduced by 20-50% by using the cheap and widely available additive.
⑤ because the raw material balls are only slightly agglomerated in the furnace, the problem of manual poking of the furnace is avoided, and the special equipment used in the shaft furnace can be used for continuous in-and-out operation, thereby realizing large-scale continuous mechanized production and reducing the labor intensity of workers.
In conclusion, compared with the prior art, the invention has remarkable progress in environmental protection of technical indexes (roasting conversion leaching rate) of roasting vanadium extraction, cost, continuous mechanization of process and large-scale, and the product V is improved in technical indexes and productivity and reduced in cost2O5The cost is reduced by more than 40 to 80 percent.
Drawings
The attached drawing is a structural schematic diagram of a roasting furnace of the equipment of the invention
Detailed Description
In the attached drawing, the upper end of a vertical roasting furnace 1 is a feed inlet 2, the lower part of the furnace body is a funnel-shaped structure 3, the lower end of the funnel-shaped structure 3 is a discharge outlet 4, an adjustable flashboard 5 for adjusting the size of the discharge outlet is arranged on the lower part of the funnel-shaped structure 3, and an electric vibration unloader 7 which is provided with a natural ventilation grate 6 is additionally arranged below the discharge outlet 4.
Example 1
Clay type vanadium ore is taken and mixed with 6 percent of potassium feldspar (the weight percentage of the total amount of the ore is as follows)) Mixing with 15% coal, crushing to particle size of about 3mm, mixing with salt 0.5% and Na2CO30.5％、Na2SO41.5 percent of pyrite cinder (hereinafter referred to as sulfur slag) 8 percent, evenly mixing, adding water to prepare raw material balls with the grain diameter of-25 mm and 12 percent of water, feeding the raw material balls into a furnace from the upper end of the shaft furnace, moving the raw material balls in the furnace from top to bottom, drying and preheating the raw material balls at the upper part of the furnace body, roasting the raw material balls at the middle part of the furnace, cooling the lower part of the furnace and the like to form clinker, discharging the clinker from the lower end of the shaft furnace by a manual or unloading machine, roasting at about 800 ℃, staying for 12 hours in the furnace, spontaneous combustion of the raw material balls in the roasting process, gradually cooling the raw material balls in the process of moving to the bottom of the furnace body after the spontaneous combustion of the raw material balls is finished; along with the continuous discharge of the clinker at the bottom, the material balls in the furnace freely fall along with the space vacated by the discharged (cooked) material from the furnace grate by the action of gravity and continuously and slowly move downwards from top to bottom, thus completing the continuous mechanized production process. The material ball is processed through the process, the vanadium element contained in the material ball is converted into a vanadium compound which can be dissolved in weak acid, medium and alkaline inorganic solvents, and the vanadium compound is added with a solvent for leaching and purification to prepare V2O5And the desired vanadium-containing compound.
Cl generated in the roasting process of the material balls in the middle of the furnace body2HCl and SO2The pollutant gas is absorbed by the substance which can react with the acid gas in the upper raw material ball, and the emission of the flue gas is detected to be HCl97.2Mg/NdM3，SO232.0Mg/NdM3And meets the national emission standard.
Grade V of clinker2O51.0 percent, 0.35 percent of leaching residue grade and 65 percent of roasting leaching rate (1-0.35)/1.0 percent.
Example 2
Mixing clay type vanadium ore with albite 8% (weight percentage of ore, the same below) and coal 10%, crushing to particle size of about 3mm, mixing with salt 0.75%, and Na2CO30.6％、Na2SO44 percent of sulfur slag and 3 percent of sulfur slag are mixed evenly, water is added to prepare raw material balls with the grain diameter of-25 mm and the water content of 13 percent, the production process of the embodiment 1 is repeated, wherein the roasting temperature is about 690 ℃, the retention time in the furnace is 9 hours, and the clinker is obtained by roasting. Detected flueGas vent HCl 102.5Mg/NdM3，SO2341.2Mg/NdM3And meets the national emission standard.
Grade V of clinker2O51.67%, leaching residue grade 0.31%, roasting leaching rate 98/1.67 in the production line(1.67-0.31)/(98-0.31)＝81.70％。
Example 3
Mixing clay type vanadium ore with nepheline 5% (weight percentage of ore, the same below) and hematite 5%, crushing to obtain powder with particle diameter of about 3mm, mixing with kcl 1% and NaHCO31％、Na3PO44 percent, evenly mixing, adding water to prepare raw material balls with the grain diameter of 25mm and the water content of 11 percent, repeating the production process of the example 1, wherein the roasting temperature is about 820 ℃, the retention time in a furnace is 15 hours, and roasting to obtain clinker. Detected flue gas emission HCl 118.3Mg/NdM3，SO223.4Mg/NdM3And meets the national emission standard.
Grade V of clinker2O51.03%, leaching residue grade 0.33%, roasting leaching rate (1.03-0.33)/1.03 ═ 67.96%.
Example 4
Mixing high-carbon stone coal, 100 kg of clay type vanadium ore (wherein the ratio of the high-carbon stone coal to the clay type vanadium ore is 2: 1) and 4 kg of alum, crushing the mixture until the particle size is about 3mm, and mixing the crushed mixture with 1.5 kg of salt and Na2CO32.5 kg of Na2SO45 kg, mixing evenly, adding water to prepare raw material balls with the particle size of 25mm and the water content of 13 percent, repeating the production process of the example 1, wherein the roasting temperature is about 790 ℃, the retention time in a furnace is 18 hours, and roasting to obtain clinker. Detected flue gas emission HCl 136.7Mg/NdM3，SO2463.7Mg/NdM3And meets the national emission standard.
Grade V of clinker2O50.98 percent, 0.26 percent of leaching residue grade and 73.47 percent of roasting leaching rate of 0.98-0.26/0.98.
Example 5
Taking waste vanadium catalyst and clay type vanadium ore according to the ratio of 1: 1, mixing with common feldspar 6% (weight percentage of vanadium-containing material, the same below), crushing to about 3mm of particle size, and mixing with5% of coke powder and 1.5% of salt2CO32.5％、Na2SO45 percent, evenly mixing, adding water to prepare raw material balls with the grain diameter of 25mm and the water content of 13 percent, repeating the production process of the example 1, wherein the roasting temperature is about 850 ℃, the retention time in a furnace is 16 hours, and roasting to obtain clinker. Detected flue gas emission HCl 125.4Mg/NdM3，SO2482.6Mg/NdM3And meets the national emission standard.
Grade V of clinker2O53.58 percent, 0.49 percent of leaching residue grade and 86.75 percent of roasting leaching rate of 98/3.58 x (3.58-0.49)/(98-0.49).
Example 6
Mixing the steelmaking vanadium slag and clay type vanadium ore according to the ratio of 1: 1, 10 percent of feldspar (the weight percentage of the total vanadium-containing material is the same as below) and 18 percent of coal, crushing the mixture to about 3mm of grain diameter,and then mixing the crushed mixture with kCl2 percent and Na2CO33％、Na2SO47 percent, evenly mixing, adding water to prepare raw material balls with the grain diameter of 25mm and the water content of 11 percent, repeating the production process of the example 1, wherein the roasting temperature is about 880 ℃, the retention time in a furnace is 20 hours, and roasting to obtain clinker. Detected flue gas emission HCl 136.3Mg/NdM3，SO2674.8Mg/NdM3And meets the national emission standard.
Grade V of clinker2O57.21%, leaching grade 0.79%, roasting leaching rate 98/7.21 x (7.21-0.79)/(98-0.79) 89.77%.
Example 7
Mixing stone coal type vanadium ore with 5% of sylvite (weight percentage of vanadium-containing material, the same below), 10% of mirabilite, 3% of feldspar and 5% of siderite, crushing to about 3mm of particle size, and mixing with Na3PO42 percent of the raw material is mixed evenly, water is added to prepare raw material balls with the grain diameter of 25mm and the water content of 13 percent, the production process of the example 1 is repeated, wherein the roasting temperature is about 720 ℃, the retention time in the furnace is 18 hours, and the clinker is obtained by roasting. Detected flue gas emission HCl 142.4Mg/NdM3，SO2532.1Mg/NdM3And meets the national emission standard.
Grade V of clinker2O51.05% grade of leaching residue0.29 percent and roasting leaching rate of (1.05-0.29)/1.05-72.38 percent.
Example 8
Mixing high calcium clay type vanadium ore with coal 15% (weight percentage of vanadium-containing material, the same below) and nepheline 5%, crushing to obtain powder with particle diameter of about 3mm, mixing with NaCl 0.5% and Na2SO48 percent of the clinker, 5 percent of the pyrite and 3 percent of the sulfur slag are mixed evenly, water is added to prepare raw material balls with the grain diameter of 25mm and the water content of 14 percent, the production process of the embodiment 1 is repeated, wherein the roasting temperature is about 780 ℃, the staying time in the furnace is 16 hours, and the clinker is obtained by roasting. Detected flue gas emission HCl 89.7Mg/NdM3，SO2986.5Mg/NdM3And meets the national emission standard.
Grade V of clinker2O51.07%, leaching residue grade 0.34%, roasting leaching rate (1.07-0.34)/1.07-68.22%.
Example 9
Mixing and crushing stone coal type vanadium ore and feldspar 4% (weight percentage of vanadium-containing material, the same below) until the particle size is about 3mm, and mixing with NaCl 0.75%, borax 5% and Na2SO45 percent of sulfur slag and 3 percent of sulfur slag are mixed evenly, water is added to prepare raw material balls with the grain diameter of 25mm and the water content of 12 percent, the production process of the example 1 is repeated, wherein the roasting temperature is about 800 ℃, the retention time in a furnace is 20 hours, and the clinker is obtained by roasting. Detected flue gas emissions HCl105.8Mg/NdM3，SO2546.2Mg/NdM3And meets the national emission standard.
Grade V of clinker2O51.25% leaching residue grade V2O50.37 percent and the roasting leaching rate of (1.25-0.37)/1.25-70.4 percent.
Claims (7)
1. A method for extracting vanadium from vanadium-containing materials by roasting is characterized in that:
① crushing the vanadium-containing material into powder, mixing with additives according to the proportion of 1: 0-30%, 1-25% and 0-10% (by weight) of the vanadium-containing material, additive A, additive B and additive C, adding water, and pelletizing to obtain a spheroidal raw material with water content of 8-18%;
② when opening the furnace, fuel is needed to be put at the bottom of the furnace to help the raw material pellets to burn, and the raw material pellets finish roasting by spontaneous combustion;
③ the raw material ball enters into the furnace from the top of the shaft furnace, the raw material ball moves from top to bottom in the furnace, the clinker is discharged from the bottom of the shaft furnace through the drying and preheating of the top of the furnace, the roasting of the middle of the furnace and the cooling of the bottom of the furnace, the roasting temperature is 650-950 ℃, the staying time in the furnace is 6-30 hours, the material ball self-ignites in the roasting process, after the material ball self-ignites, the material ball cools gradually in the moving process towards the bottom of the furnace, along with the continuous discharging of the clinker at the bottom, the material ball in the furnace moves downwards slowly from top to bottom due to the gravity action, the continuous mechanized production process is completed, the complex substance composition of the vanadium-containing material and the additive can react as:
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(11)2V3++Na2O+3/2O2＝2NaVO3
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in the drying and roasting stage of the raw material ball, the vanadium element contained in the raw material ball isconverted into a vanadium compound which can be dissolved in weak acid, medium and alkaline inorganic solvents, and then the vanadium compound is leached and purified to prepare the required vanadium compound;
the additive A is fuel;
the additive B is additive B1+ additive B2+ additive B3；
Additive B1KCl or NaCl, sylvine (xKCl. yNaCl);
additive B2Is Na2CO3And/or Na2SO4；
Additive B3Are other alkali metal salts;
the additive C is a substance capable of reacting with acid gas.
2. The method of claim 1 wherein said additive B is3Is NaHCO3、Na2SO3、Na3PO4、NaH2PO4、Na2B4O710H2O、NaNO3、Na2SiO3、K2CO3、K2SO4Potassium feldspar (K)2O·Al2O3·6SiO2) Albite (Na)2O·Al2O3·6SiO2) Nepheline (Na. K)2O·Al2O3·2SiO2Alum K2SO4·Al2(SO4)3·24H2O
3. The method of claim 1 wherein said additive C is Al, i.e. a substance reactive with acid gases2O3、FeO、Fe2O3Pyrite cinder and siderite (iron carbonate).
4. The method of claim 1 wherein said vanadium-containing material and additive are present in the following weight ratio of vanadium-containing material: additive A and additive B1Additive B2Additive B3And the additive C is uniformly mixed according to the proportion of 1: 0-18%, 0-8%, 1-8%, 0-8% and 0-8% (weight percentage), and water is added to the mixture to prepare spherical raw materials with the water content of 9-17% and the diameter not larger than 30mm through a pelletizer.
5. The method of claim 1 wherein said vanadium-containing material and additive are present in the following weight ratio of vanadium-containing material: fuel, NaCl, Na2CO3、Na2SO4The feldspar and the substance capable of reacting with the acid gas are uniformly mixed according to the weight percentage of 1: 0-16%, 1-7%, 1-5%, 0-6%, 0-7% and 0-7%, and water is added to the mixture to prepare a mixture with the water content of 95% and not more than phi 30mm through a pelletizer10-16% of spherical raw material.
6. The method according to claim 1, wherein the calcination temperature is 650 to 900 ℃ and the residence time in the furnace is 10 to 20 hours.
7. An apparatus for carrying out the method of claim 1, wherein: the equipment comprises a vertical roasting furnace (1), wherein the upper end of the roasting furnace (1) is provided with a feeding hole (2), the lower part of a furnace body is provided with a funnel-shaped structure (3), the lower end of the funnel-shaped structure (3) is provided with a discharging hole (4), the lower part of the funnel-shaped structure (3) is provided with an adjustable flashboard (5) for adjusting the size of the discharging hole, and a discharging machine (7) which can be provided with a natural ventilation grate bar (6) is additionally arranged below the discharging hole (4).
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| CN100523232C (en) * | 2006-01-24 | 2009-08-05 | 彭新宇 | High-efficiency basic chlorine-fixing composite vanadium-extracting additive |
| CN101787430B (en) * | 2010-01-25 | 2011-10-05 | 辽宁晨光铁合金集团有限公司 | Method for increasing leaching rate of navajoite under navajoite kiln roasting condition |
| CN101892380A (en) * | 2010-07-02 | 2010-11-24 | 淅川县玉典钒业有限责任公司 | Method for preparing vanadium pentoxide and roasting additive used therein |
| CN103266230A (en) * | 2013-05-08 | 2013-08-28 | 北京神雾环境能源科技集团股份有限公司 | Vanadium-containing stone coal shaft furnace oxygen-rich roasting system and method thereof |
| CN103266230B (en) * | 2013-05-08 | 2015-04-22 | 北京神雾环境能源科技集团股份有限公司 | Vanadium-containing stone coal shaft furnace oxygen-rich roasting system and method thereof |
| CN104694735A (en) * | 2015-02-17 | 2015-06-10 | 河北钢铁股份有限公司承德分公司 | Method for improving oxidization efficiency in vanadium slag roasting process |
| WO2017107234A1 (en) * | 2015-12-25 | 2017-06-29 | 广东基泰智能设备有限公司 | Powder spraying apparatus |
| CN105420520A (en) * | 2015-12-29 | 2016-03-23 | 攀枝花恒弘球团有限公司 | Extraction method for vanadium in vanadium slag |
| CN105907950A (en) * | 2016-04-29 | 2016-08-31 | 浙江大学 | Treatment method for metallurgy sintering of abandoned SCR flue gas denitrification catalyst |
| CN106244808A (en) * | 2016-08-11 | 2016-12-21 | 攀钢集团西昌钢钒有限公司 | Powder vanadium-containing material reclaims the method for vanadium |
| CN111057878A (en) * | 2020-01-02 | 2020-04-24 | 长沙有色冶金设计研究院有限公司 | Ore dressing method for vanadium ore |
| CN111647706A (en) * | 2020-07-21 | 2020-09-11 | 攀钢集团攀枝花钢钒有限公司 | Converter vanadium extraction coolant and production method thereof |
| CN111647706B (en) * | 2020-07-21 | 2022-01-28 | 攀钢集团攀枝花钢钒有限公司 | Converter vanadium extraction coolant and production method thereof |
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